Table-leg fastening.



No. 738,124. PATBNTED SEPT; 1, 1 903.

- J. H. ROBBINS.

TABLE LEG FASTENING APPLIOATIOI nun 00mm. 1902" no 10mm. 2 snnn'rs-snnm1.

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No. 738,124. PATENTED SEPT. 1, 1903.

J. H. ROBBINS.

TABLE LEG FASTENING.

APPLICATION FILED 00'1.20, 1902.

N0 MODEL. 2 SHEETS-SHEET 2.

P if If I v UNITED STATES Patented September 1, 1903;

PATENT OFFICE.

JOSEPH II. ROBBINS, OF OWOSSO, MICHIGAN, ASSIGNOR OF ONE-HALF TO WILLIAMJ. BOYCE, OF OW'OSSO, MICHIGAN.

TABLE LEG FASTENING.

SPECIFICATION forming part of Letters Patent No. 738,124, datedSeptember 1, 1903.

Application filed October 20, 1902. berial No. 127,986. (No model.)

To all whom, it nttty concern:

Be it known that I, JOSEPH H. ROBBINS, a citizen of the United States,residing at Owosso, in the county of Shiawassee and State of Michigan,have invented new and useful Improvements in Table-LegFastenings,ofwhich the following is a specification.

This invention relates to a new and useful device for attaching legs totables, and more especially to the means for attaching tablelegs to thebridges of extension-tables in such a manner that the table-leg can bereadily attached and detached.

The invention consists in the construction and arrangement of partshereinafterparticularly described and claimed.

The objects of my invention are, first, to produce an attaching devicewhereby the leg of an extension-table can be readily attached anddetached; second, to furnish an attachment which will hold the legrigidly in place and prevent the same from becoming loosened whenin use;third, to furnish an attachment which can be readilyapplied to anyextensiontable where the legs are supported by the bridges orcross-pieces. These objects I accomplish by means of the mechanismillustrated in the accompanying drawings, in which--- Figure 1 shows aninverted plan view of an extension-table frame with the bridges in placeand indications in dotted lines for the positions of the legs. Fig. 2shows a transverse section through one of the bridges and a table-leg,with a part cut away, attached thereto, also shows in section theattaching wedge, which engages with the bolt used in securing thetable-leg to the bridge. Fig. 3 shows a longitudinal section of one ofthe bridges, taken on the line X X of Fig. 1. Fig. 4 shows an invertedplan view of my preferred form of bifurcated wedge which engages withthe head of the bolt which attaches the table-leg to the bridge.

Similarletters refer to similar parts throughout the several views.

A represents the framework of an extensiontable containing my improvedtable-leg attaching device.

13 B B represent the bridges, usually three in number, on an ordinaryextension-table.

M M represent the bridge-blocks by means of which the bridges aresecured to the tabletop.

0 re pesents the table-leg. I prefer to have an upward projectionintegral with the leg which extends into an openingin the bridge, asshown by G in Fig. 2. The object of this projection is to add rigidityto the attachment. Engaging with this table-leg is the coach or lagscrew D,the same projecting from the table-leg a sufficient distance toallow the head of the lag screw to engage with my bifurcatedwedge-shaped device, which secures the same in place.

E shows the head of the coach or lag screw.

WV is the wedge-shaped attaching device, which is preferably dovetail inform and adapted to fit into a dovetailed groove P on the upper side ofthe bridge. This wedge W is bifurcated, as shown, by'the slot R, and thetwo sides of the bifurcation are wedgeshaped, so as to engage securelywith the head of the bolt D and to be pressed beneath the head of thesaid bolt, so as to draw the table-leg securely against the under sideof the bridge. I also prefer to provide a slot S in the wedge W in orderthat the same may be secured to the bridge and yet allow thelongitudinal movement of the wedge in attaching and detaching thetable-leg. As a suitable means for securing the wedge W to the bridge B,I prefer to use a carriage-bolt F, provided with a nut H, said boltpassing loosely through the slot S of the wedge W. The wedge W is alsoprovided with preferably a flange L, which flange is used merely as aconvenience for withdrawing the wedge when it is desirable to remove theleg from the table.

K K showthe dovetail feature of the wedge.

The operation of my invention is as follows: A groove P is cuttransversely across the bridge. A bolt D is secured in the table-leg O.The head of the bolt is passed through an opening in the bridge, so asto allow the head to projectabove the upper side of the bridge. Thewedge W is then pressed along the groove in the bridge-piece, thebifurcations straddling the bolt below the head, drawing the said boltand table-leg into position, the wedge W being so constructed as to drawthe table-leg so securely against the under side of the bridge as tosecure great rigidity in the connection. In removing the table-leg allthat is necessary to do is to loosen the nut H on the carriage-bolt Fand withdraw the wedge until the head E of the bolt D clears the wedgeThe leg then can be readily removed.

By this construction the table-leg can be very readily attached anddetached and is attached in a most rigid and substantial manner.

I have described my preferred form of wedge and its application to thebridge of the table; but it will be evident that variations may be madefrom the description without departing from the spirit of the invention.

Having thus described my invention, what I claim to have invented, anddesire to secure by Letters Patent, is-

1. The combination of the bridge of an extension-table, said bridgehaving a dovetail and undercut groove in its upper surface and having ahole extending therethrough, a bifurcated wedge, beveled at its sides,mounted to slide in said undercut groove, said wedge having alongitudinal slot, a pin fastened to said bridge and projecting throughsaid slot, a table-leg, and a headed bolt in said tableleg, said boltextending through the hole in said bridge and being engaged by saidwedgepiece.

2. The combination of the bridge of an extension-table, said bridgehaving a dovetail or undercut groove in its upper surface and having ahole extending therethrough, a bifureated wedge, beveled at its sides,mounted to slide in said undercut groove, said wedge having alongitudinal slot therein and having a handle formed by bending itslarge end downward at an angle, a pin fastened to said bridge-piece andprojecting through the slot in said wedge, a table-leg, and a headedbolt in said table-leg, said bolt extending through the hole in saidbridge and being engaged by said wedge-piece.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

, JOSEPH H. ROBBINS. Witnesses:

CHAS. M. WILSON, EDWARD TAGGART.

